Cigarette and tobacco products sold here are to feature standardised packaging from today.
This means all forms of branding like trademarks, logos and colours are being removed from packs.
The brand and variant names will be a uniform typeface and colour.
Some examples of standardised cigarette packs used in Australia in 2014 | Image: Ella Pickover/PA Archive/PA Images
The commencement order was signed in March 2017, which meant all products manufactured for sale in Ireland from September 30th must be in standardised retail packaging.
A transition period for products manufactured and placed on the market before this date runs out on Saturday.
Pro-smokers’ group Forest Ireland has criticised the measure.
Spokesman John Mallon says: "Plain packaging is yet another victory for those who want Ireland to be an oppressive nanny state in which adults are treated like children and teenagers are treated like idiots."